CN116970790A - Annealing process for improving control of hot rolled plate shape of duplex stainless steel - Google Patents
Annealing process for improving control of hot rolled plate shape of duplex stainless steel Download PDFInfo
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- CN116970790A CN116970790A CN202311035095.6A CN202311035095A CN116970790A CN 116970790 A CN116970790 A CN 116970790A CN 202311035095 A CN202311035095 A CN 202311035095A CN 116970790 A CN116970790 A CN 116970790A
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- 238000000137 annealing Methods 0.000 title claims abstract description 187
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910001039 duplex stainless steel Inorganic materials 0.000 title claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 63
- 238000004140 cleaning Methods 0.000 claims abstract description 59
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 56
- 239000010959 steel Substances 0.000 claims abstract description 56
- 238000005238 degreasing Methods 0.000 claims abstract description 36
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 230000003139 buffering effect Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 239000007921 spray Substances 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000005098 hot rolling Methods 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 230000007547 defect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
Abstract
The invention discloses an annealing process for improving control of a hot rolled plate shape of duplex stainless steel, which comprises the following process steps of 1) degreasing treatment; 2) Annealing and buffering; 3) Annealing and heating; 4) Annealing at constant temperature; 5) And (5) cooling treatment. According to the invention, the degreasing box is arranged, the steel belt is cleaned in a multi-directional reciprocating rotation manner through the rolling brush mechanism, so that the surface of the steel belt is cleaned, sewage generated by fixed-point cleaning can be directly discharged through the arrangement of the collecting box I, the brush roller can be cleaned through the cleaning mechanism, the cleaning effect of the brush roller is ensured, and meanwhile, the cooling mechanism is used for adapting to the cooling effect of different steel belts by adjusting the distance and angle between the cooling pipe and the steel belt.
Description
Technical Field
The invention belongs to the technical field of duplex stainless steel annealing, and particularly relates to an annealing process for improving control of a hot rolled plate shape of duplex stainless steel.
Background
The duplex stainless steel is a stainless steel with the ferrite phase and the austenite phase in solid solution structures accounting for nearly half, has excellent mechanical property and welding property and good corrosion resistance in various corrosion environments, but the duplex structure brings the defect of difficult processing while giving the excellent property to the duplex stainless steel, the cooling speed and chemical components should be controlled in time, and the existing annealing device has the following problems in the use process: 1) When degreasing treatment is carried out before annealing, the rolling brush or the scraping plate is not cleaned in real time, so that more greasy dirt is adsorbed and remained on the surface of the rolling brush or the scraping plate after a period of time, the cleaning capability is reduced, greasy dirt is remained on the steel belt, and surface defects such as black spots, carbon deposition and the like are formed after annealing; 2) The cooling rate cannot be adjusted in the cooling device after annealing, so that the mechanical properties of part of the steel strip are poor.
Through retrieval, prior art CN211645402U discloses a cleaning preheating device for a stainless steel strip annealing furnace, which comprises an unreeling seat, a conveying seat and a cleaning seat, wherein the unreeling seat, the conveying seat and the cleaning seat are sequentially arranged and are used for conveying a stainless steel strip on the unreeling seat to the cleaning seat through the conveying seat, the cleaning device also comprises a support plate, a conveying roller group, a spraying pipe group, a first drying preheater, a second drying preheater and a brush roller group which are arranged on the cleaning seat, wherein the two support plates are respectively arranged on the top surface of the cleaning seat and are positioned on two sides of the conveying direction of the stainless steel strip, the conveying roller group, the spraying pipe group, the brush roller group, the first drying preheater and the second drying preheater are sequentially arranged on the support plate along the conveying direction of the stainless steel strip, and the technical scheme cleans the upper surface and the lower surface of the stainless steel strip through the upper spraying pipe and the lower spraying pipe of the spraying pipe group and scrapes the upper surface and the lower surface of the conveyed stainless steel strip through the brush roller group, so that the surface of the stainless steel strip is dried; but the following problems exist during use: 1) The single flushing is carried out by the spray pipe, so that the greasy dirt adhered on the surface is difficult to clean; ) The brush roller set is not cleaned in real time, and the cleaning capacity is reduced after the brush roller set is fully filled with water or is fully stained with oil stains, so that partial impurities can remain on the surface of the steel belt, and the annealing effect is affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an annealing process for improving the control of the hot rolled plate shape of the duplex stainless steel, wherein a degreasing box is arranged, a rolling brush mechanism is used for cleaning the surface of a steel belt in a multi-azimuth reciprocating rotation manner, and the collection box I is arranged to directly discharge sewage generated by fixed-point cleaning, and a cleaning mechanism is used for cleaning a brush roller to ensure the cleaning effect of the brush roller, and meanwhile, the cooling mechanism is used for adapting to the cooling effect of different steel belts by adjusting the distance and angle between a cooling pipe and the steel belt.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an annealing process for improving control of the hot rolled plate shape of duplex stainless steel comprises the following steps,
1) Degreasing: cleaning oil dirt and impurities on the surface of the rolled steel strip in an elastic degreasing box;
the degreasing device is characterized in that two groups of driving rollers and a plurality of guide rollers are arranged in the degreasing box, steel strips are wound on the outer sides of the driving rollers and the guide rollers, a rolling brush mechanism is arranged on one side of the guide roller above, a cleaning mechanism is arranged on one side of the rolling brush mechanism, and a collecting box I is arranged below the rolling brush mechanism; the rolling brush mechanism comprises a fixed plate, a sliding groove, a motor I, an eccentric wheel, a mounting frame, a limiting groove plate, a water baffle, a brush roller, a mounting shaft, a hub motor, a cleaning spray head, a connecting plate, an electric telescopic rod I, a water supply pipe, a water pump II and a water tank II, wherein the fixed plate is fixedly arranged inside a degreasing box;
the bottom of one end of the collecting box I is provided with a through hole, the bottom of one end of the collecting box I extending out of the degreasing box 11 is provided with a through hole, and a collecting box III is arranged below the through hole and used for uniformly recycling sewage in the two groups of collecting boxes I;
the cleaning mechanism comprises a protection box, a sliding table, a motor II, a screw rod, a guide rod, a movable base, a limit rod, an electric telescopic rod II, a locking rod, a fixed seat, an electric telescopic rod III, a push plate, a storage box, an electric telescopic rod IV and an electric telescopic rod V, wherein the protection box is fixedly arranged outside a degreasing box; the cleaning block bottom is equipped with the spacing groove, is equipped with the locking groove between two sets of spacing grooves.
2) And (3) annealing and buffering: the steel strip is pretreated in an annealing chamber I in an annealing furnace at a speed of 15-60m/min, and the temperature in the annealing chamber I is controlled at 450-550 ℃;
the annealing furnace is characterized in that a degreasing box is arranged on one side of the inlet end of the annealing furnace, a frame is arranged on one side of the outlet end of the annealing furnace, two groups of driving rollers are arranged on the frame, one side of each driving roller is fixedly connected with the output end of a driving motor I, a cooling mechanism is arranged on the frame, a water tank I is arranged on one side of the frame, and a water pump I is arranged above the water tank I; the annealing furnace is internally provided with a plurality of partition boards, the annealing furnace is divided into an annealing chamber I, an annealing chamber II, an annealing chamber III, an annealing chamber IV, an annealing chamber V, an annealing chamber VI, an annealing chamber VII and an annealing chamber VIII by the plurality of partition boards, the top of the plurality of annealing chambers is fixedly communicated with an air inlet pipe, a plurality of burners are arranged at the bottom of the annealing furnace, a plurality of transmission rollers are arranged in the annealing furnace, one side of each transmission roller is fixedly connected with a driving motor II, one side of each annealing furnace is provided with a motor III, a plurality of rollers are arranged on an output main shaft of the motor III, a connecting belt is wound on each roller, and a plurality of spoilers are fixedly arranged on each connecting belt.
3) Annealing and heating treatment: the steel strip passes through an annealing chamber II, an annealing chamber III, an annealing chamber IV and an annealing chamber V in an annealing furnace at a speed of 15-60m/min for annealing treatment, and the temperatures in the annealing chamber II, the annealing chamber III, the annealing chamber IV and the annealing chamber V are respectively controlled at 580-620 ℃; 650-710 ℃; 750-800 ℃; 810-860 ℃;
4) Annealing and performing constant temperature treatment: the steel strip passes through an annealing chamber VI, an annealing chamber VII and an annealing chamber VIII in an annealing furnace at a speed of 15-60m/min for annealing treatment, and the temperature in the annealing chamber VI, the annealing chamber VII and the annealing chamber VIII is controlled to be 970-1120 ℃;
5) And (3) cooling treatment: the steel belt is rapidly cooled to 20-60 ℃ by a cooling mechanism through a spray cooling method;
the cooling mechanism comprises a movable frame I, a guide frame, an electric telescopic rod VI, a cooling pipe, a rotary joint, a fixed plate, an adjusting frame, a fixed water pipe, an electric telescopic rod VII, a movable frame II, an electric telescopic rod VIII and a limiting plate, wherein the limiting plate is fixedly arranged on supporting beams on two sides of the frame, the movable frame II is movably arranged in the limiting plate, the electric telescopic rod VIII is arranged between the movable frame II and the frame, two groups of movable frames I are respectively arranged on the upper side and the lower side of a steel belt, one side of the movable frame I is provided with the electric telescopic rod VI, the other end of the electric telescopic rod VI is fixedly arranged on the movable frame II, the movable frame I is movably provided with the cooling pipe, one side of the cooling pipe is provided with a plurality of high-pressure spray heads, one end of the cooling pipe is fixedly communicated with the rotary joint, the rotary joint is arranged on the movable frame I through the fixed plate, a gear arranged on one side of the cooling pipe is meshed with a rack arranged on one side of the adjusting frame, the adjusting frame is movably arranged on the guide frame, the guide frame is fixedly arranged on one side of the movable frame I, one side of the guide frame is fixedly arranged with the electric telescopic rod VII, one side of the electric telescopic rod VI is fixedly arranged, one end of the electric telescopic rod is fixedly arranged on the other side of the guide frame I is fixedly arranged on the other side of the telescopic frame, one end of the rotary joint is fixedly arranged on the other side of the movable frame II, the rotary joint is fixedly arranged on the other end of the rotary joint, one end of the rotary joint is fixedly arranged on the water pipe I, one end of the water pump is fixedly arranged on the other end of the rotary joint is through the rotary joint, and is fixedly connected with one end of the other end of the water pipe I through one end and is fixedly connected with one end.
Compared with the prior art, the invention has the beneficial effects that:
1) The steel belt is guided by a plurality of guide rollers in the degreasing box to change in a certain direction, so that the brush roller in the rolling brush mechanism is convenient for cleaning the surface of the steel belt, sewage, oil stains and the like generated in the cleaning process can be ensured to drop in the collecting box I, and the influence on the concentration of cleaning liquid caused by the dropping in a large range in the degreasing box is avoided;
2) The brush roller is in the clear in-process of steel band, motor I output eccentric wheel drives the mounting bracket along fixed plate reciprocating motion through meshing spacing frid, thereby drive the brush roller and brush reciprocally at steel band surface, simultaneously can be through the flexible of control electric telescopic handle I, the angle of wasing the shower nozzle is adjusted through the connecting plate, the cooperation brush roller accomplishes the clearance work of steel band surface impurity, brush roller one side breakwater can prevent that liquid from splashing, can drip to collecting box I in baffle one side after blockking and collecting the liquid that splashes, brush roller cooperation through reciprocating motion washs shower nozzle spun washing liquid, can wash the steel band surface impurity cleanly, the local washing that avoids fixed round brush to bring is incomplete problem to appear, the setting of breakwater can avoid the liquid that the brush roller high-speed rotation in-process to splash and pollute simultaneously;
3) After the brush roller is used for a period of time, the motor II drives the screw rod to rotate through starting the cleaning mechanism, so that the movable base is driven to reciprocate along the guide rod, when the movable base moves to one side of the storage box, the electric telescopic rod IV stretches to push out the cleaning block in the storage box, the upper limit groove of the cleaning block is meshed with the limit rod on one side of the movable base, after the cleaning block is installed in place, the locking rod is driven to rotate through the electric telescopic rod II, the locking groove at the bottom of the cleaning block is meshed to complete locking, and then the cleaning block is driven by the screw rod to move downwards and reciprocate under the brush roller to clean the brush roller regularly, so that the impurities such as chips and greasy dirt adhered on the surface of the brush roller are erased; therefore, the problem of reduced cleaning capability of the brush roller during long-time working can be effectively avoided, the cleanliness of the surface of the steel belt can be always ensured, and surface defects generated in the annealing process are avoided;
4) After the cleaning block is cleaned for a period of time, the movable base moves to one side of the push plate, the locking rod is driven by the electric telescopic rod II to be separated from the locking groove, then the push plate is driven by the electric telescopic rod III to move, the cleaning block is pushed away from the movable base and falls on the protection box lowering sliding table and is transferred to the collection box II for uniform collection, and the cleaning efficiency can be greatly improved through automatic separation and automatic installation of the cleaning block, so that the safety problem caused by the operation of workers on the machine is avoided;
5) The motor III rotates to uniformly drive the rollers to rotate so as to drive the connecting belt to rotate, and the connecting belt drives the spoiler to move in the compartments in the rotating process, so that the turbulent stirring of the compartments in the annealing furnace is completed, the temperature in the compartments is more uniformly dispersed, inert gas entering the air inlet pipe can be rapidly and uniformly distributed in the compartments, the annealing efficiency can be greatly improved, and the annealing quality of the steel belt is ensured;
6) In the cooling process of the cooling mechanism, the angles and the heights of the cooling pipes can be adjusted according to different thicknesses and different chemical components of the steel belt, so that the optimal cooling effect is achieved, the distance between the cooling pipes and the steel belt is controlled through adjustment of the electric telescopic rod VI, the adjusting rack is driven to engage with the cooling pipes to finish the change of the angle through telescopic adjustment of the electric telescopic rod VII, the cooling distance can be controlled through adjustment of the angle of the cooling pipes, the cooling time can be controlled, the electric telescopic rod VIII can be adjusted, the distance among multiple groups of cooling pipes can be controlled, continuous cooling or intermittent cooling of the steel belt can be achieved, multiple adjustments of the heights, the angles and the like of the cooling pipes can be achieved through control of multiple groups of telescopic rods, the cooling requirement under annealing of multiple steel belts is greatly met, and the cooling efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of an annealing process for improving control of hot rolled duplex stainless steel plate shape according to the present invention;
FIG. 2 is a schematic side view of an annealing furnace;
FIG. 3 is a schematic diagram of the internal structure of the degreasing tank;
FIG. 4 is a schematic diagram of the structure of the collecting box I;
FIG. 5 is a schematic illustration of a mounting plate structure;
FIG. 6 is a schematic diagram of a limiting slot plate structure;
FIG. 7 is a schematic view of a brush roll configuration;
FIG. 8 is a schematic view of the internal structure of a brush roll;
FIG. 9 is a schematic view of the internal structure of the protective case;
FIG. 10 is a schematic view of the structure of the movable base;
FIG. 11 is a schematic view of the internal structure of the annealing furnace;
FIG. 12 is a schematic view of a spoiler structure;
FIG. 13 is a schematic diagram of a frame construction;
FIG. 14 is a schematic view of a structure of a movable frame II;
FIG. 15 is a schematic view of the structure of the adjusting frame;
FIG. 16 is an enlarged view of a portion of FIG. 5 at A;
in the figure: 10. a steel strip; 11. a degreasing box; 12. a driving roller; 13. a guide roller; 14. a rolling brush mechanism; 15. a collecting box I; 16. a cleaning mechanism; 17. a cleaning block; 18. a collecting box II; 19. annealing furnace; 20. a frame; 21. a cooling mechanism; 22. a water tank I; 121. a driving motor I; 141. a fixing plate; 1411. a chute; 142. a motor I; 1421. an eccentric wheel; 143. a mounting frame; 1431. limiting groove plates; 144. a water baffle; 145. a brush roller; 1451. a mounting shaft; 1452. a hub motor; 146. cleaning the spray head; 147. a connecting plate; 148. an electric telescopic rod I; 149. a water supply pipe; 1491. a water pump II; 1492. a water tank II; 151. a collecting box III; 161. a protection box; 1611. a sliding table; 162. a motor II; 163. a screw; 164. a guide rod; 165. a movable base; 1651. a limit rod; 1652. an electric telescopic rod II; 1653. a locking lever; 1654. a fixing seat; 166. an electric telescopic rod III; 1661. a push plate; 167. a storage box; 168. an electric telescopic rod IV; 169. an electric telescopic rod V; 171. a limit groove; 172. a locking groove; 191. a partition plate; 192. a burner; 193. a motor III; 194. a roller; 195. a connecting belt; 196. a spoiler; 197. an annealing chamber I; 1971. an annealing chamber II; 1972. annealing chamber III; 1973. an annealing chamber IV; 1974. an annealing chamber V; 1975. an annealing chamber VI; 1976. an annealing chamber VII; 1977. an annealing chamber VIII; 198. an air inlet pipe; 199. a conveying roller; 1991. a driving motor II; 211. a movable frame I; 2111. a guide frame; 212. an electric telescopic rod VI; 213. a cooling tube; 214. a rotary joint; 215. a fixing plate; 216. an adjusting frame; 217. fixing a water pipe; 218. an electric telescopic rod VII; 219. a movable frame II; 2191. an electric telescopic rod VIII; 2192. a limiting plate; 221. and a water pump I.
Detailed Description
The technical solution of the present invention will be further specifically described below with reference to fig. 1 to 16 for the understanding of those skilled in the art.
Example 1:
an annealing process for improving control of the hot rolled plate shape of duplex stainless steel comprises the following steps,
1) Degreasing: cleaning oil dirt and impurities on the surface of the rolled steel strip in an elastic degreasing box;
the degreasing device is characterized in that two groups of driving rollers 12 and a plurality of guide rollers 13 are arranged in the degreasing box 11, a steel belt 10 is wound on the outer sides of the driving rollers 12 and the guide rollers 13, a rolling brush mechanism 14 is arranged on one side of the guide rollers 13 above, a cleaning mechanism 16 is arranged on one side of the rolling brush mechanism 14, and a collecting box I15 is arranged below the rolling brush mechanism 14; the rolling brush mechanism 14 comprises a fixed plate 141, a sliding groove 1411, a motor I142, an eccentric wheel 1421, a mounting frame 143, a limiting groove plate 1431, a water baffle 144, a brush roller 145, a mounting shaft 1451, a hub motor 1452, a cleaning nozzle 146, a connecting plate 147, an electric telescopic rod I148, a water supply pipe 149, a water pump II 1491 and a water tank II 1492, wherein the fixed plate 141 is fixedly arranged in the degreasing box 11, the mounting frame 143 is movably arranged on one side of the fixed plate 141 in a meshing manner, the limiting groove plate 1431 arranged on one side of the mounting frame 143 penetrates through the sliding groove 1411 on one side of the fixed plate 141 and is movably arranged on the output end of the motor I142 in a protruding shaft meshing manner, the motor I142 is arranged on the fixed plate 141, the other side of the mounting frame 143 is provided with a water baffle 144, the water baffle 144 is fixedly provided with a mounting shaft 1451, the mounting shaft 1451 is provided with a hub motor 1452, the outer side of the hub motor 1452 is provided with a brush roller 145, the brush roller 145 is movably arranged on the mounting shaft 1451, one side of the water baffle 144 is movably provided with a cleaning spray head 146, one side of the cleaning spray head 146 is fixed through a connecting plate 147, one side of the connecting plate 147 is movably connected with one end of an electric telescopic rod I148, the other end of the electric telescopic rod I148 is movably arranged on the mounting frame 143, one end of the cleaning spray head 146 is communicated with a water supply pipe 149 through a hose, one end of the water supply pipe 149 is closed, the other end of the cleaning spray head is fixedly communicated with one end of a water pump II 1491, and the other end of the water pump II 1491 extends into a water tank II 1492;
the bottom of one end of the collecting box I15 is provided with a through hole, the bottom of one end of the collecting box I15 extending out of the degreasing box 11 is provided with a through hole, and a collecting box III 151 is arranged below the through hole and used for uniformly recycling sewage in the two groups of collecting boxes I15;
the cleaning mechanism 16 comprises a protection box 161, a sliding table 1611, a motor II 162, a screw 163, a guide rod 164, a movable base 165, a limit rod 1651, an electric telescopic rod II 1652, a locking rod 1653, a fixing seat 1654, an electric telescopic rod III 166, a push plate 1661, a storage box 167, an electric telescopic rod IV 168 and an electric telescopic rod V169, wherein the protection box 161 is fixedly arranged on the outer side of the degreasing box 11, the motor II 162 is arranged on one side of the protection box 161, the screw 163 is movably arranged on the protection box 161 and the degreasing box 11, the guide rod 164 is arranged on two sides of the screw 163, the guide rod 164 is fixedly arranged on the protection box 161 and the degreasing box 11, the screw 163 and the guide rod 164 are in meshed movable base 165, the limit rod 1651 is arranged on one side of the movable base 165, the limit rod 1651 is movably arranged on the cleaning block 17, the bottom of the movable base 165 is provided with the fixing seat 1654, the locking rod 1653 is movably arranged on the fixing seat 4, one side of the locking rod 1653 is movably connected with the electric telescopic rod II 1652, the other end of the electric telescopic rod 1652 is movably arranged on the upper side of the protection box 165, a screw 163 is arranged on one side of the movable base, a screw 163 is provided with the guide rod 167, the guide rod 167 is arranged on the other side of the electronic telescopic rod 167, the electronic telescopic rod 161 is arranged on the other side, the side of the protection box, and the guide box, the guide box is arranged on the guide box, the 167 is arranged on the side, the guide box, the side and the guide box, the cleaning block is arranged on the side and the cleaning block, and the side of the cleaning block is mounted by the side and the limit box, and the front side and the cleaning block and the front side and the front box and the front; the bottom of the cleaning block 17 is provided with limiting grooves 171, and locking grooves 172 are arranged between the two groups of limiting grooves 171.
2) And (3) annealing and buffering: the steel strip is pretreated by an annealing chamber I197 in an annealing furnace at the speed of 20m/min, and the temperature in the annealing chamber I197 is controlled at 530 ℃;
the degreasing device is characterized in that a degreasing box 11 is arranged on one side of the inlet end of the annealing furnace 19, a frame 20 is arranged on one side of the outlet end of the annealing furnace, two groups of driving rollers 12 are arranged on the frame 20, one side of each driving roller 12 is fixedly connected with the output end of a driving motor I121, a cooling mechanism 21 is arranged on the frame 20, a water tank I22 is arranged on one side of the frame 20, and a water pump I221 is arranged above the water tank I22; the annealing furnace 19 is internally provided with a plurality of partition boards 191, the annealing furnace is divided into an annealing chamber I197, an annealing chamber II 1971, an annealing chamber III 1972, an annealing chamber IV 1973, an annealing chamber V1974, an annealing chamber VI 1975, an annealing chamber VII 1976 and an annealing chamber VIII 1977 by the plurality of partition boards 191, the top of the plurality of annealing chambers is fixedly communicated with an air inlet pipe 198, the bottom of the annealing chamber is provided with a plurality of burners 192, a plurality of transmission rollers 199 are arranged in the annealing furnace 19, one side of each transmission roller 199 is fixedly connected with a driving motor II 1991, one side of the annealing furnace 19 is provided with a motor III 193, a plurality of rollers 194 are arranged on an output main shaft of the motor III 193, a connecting belt 195 is wound on each roller 194, and a plurality of spoilers 196 are fixedly arranged on the connecting belt 195.
3) Annealing and heating treatment: the steel strip is annealed in annealing chambers II 1971, III 1972, IV 1973 and V1974 in an annealing furnace at a speed of 20m/min, and the temperatures in the annealing chambers II 1971, III 1972, IV 1973 and V1974 are respectively controlled at 616 ℃;703 ℃;786 ℃;855 deg.C;
4) Annealing and performing constant temperature treatment: the steel strip is annealed in an annealing furnace through an annealing chamber VI 1975, an annealing chamber VII 1976 and an annealing chamber VIII 1977 at a speed of 20m/min, and the temperatures in the annealing chamber VI 1975, the annealing chamber VII 1976 and the annealing chamber VIII 1977 are all controlled to be 1100 ℃;
5) And (3) cooling treatment: the steel strip is rapidly water-cooled to 53 ℃ by a cooling mechanism 21 through a spray cooling method;
the cooling mechanism 21 comprises a movable frame I211, a guide frame 2111, an electric telescopic rod VI 212, a cooling pipe 213, a rotary joint 214, a fixed plate 215, an adjusting frame 216, a fixed water pipe 217, an electric telescopic rod VII 218, a movable frame II 219, an electric telescopic rod VIII 2191 and a limiting plate 2192, wherein the limiting plate 2192 is fixedly arranged on supporting beams at two sides of the frame 20, the movable frame II 219 is movably arranged in the limiting plate 2192, the electric telescopic rod VIII 2191 is arranged between the movable frame II 219 and the frame 20, two groups of movable frames I211 are arranged in the movable frame II 219 and are respectively positioned at the upper side and the lower side of the steel belt 10, one side of the movable frame I211 is provided with the electric telescopic rod VI 212, the other end of the electric telescopic rod VI 212 is fixedly arranged on the movable frame II 219, the movable frame I211 is movably provided with a cooling pipe 213, one side of the cooling pipe 213 is provided with a plurality of high-pressure spray heads, one end of the cooling pipe 213 is fixedly communicated with a rotary joint 214, the rotary joint 214 is arranged on the movable frame I211 through a fixed plate 215, a gear arranged on one side of the cooling pipe 213 is meshed with a rack arranged on one side of an adjusting frame 216, the adjusting frame 216 is movably arranged on a guide frame 2111, the guide frame 2111 is fixedly arranged on one side of the movable frame I211, one side of the guide frame 2111 is fixedly provided with an electric telescopic rod VII 218, the telescopic end of the electric telescopic rod VII 218 is fixedly arranged on the adjusting frame 216, the other end of the rotary joint 214 is communicated with a fixed water pipe 217 through a telescopic hose, one end of the fixed water pipe 217 is closed, the other end of the fixed water pipe 217 is communicated with one end of a water pump I221, and the other end of the water pump I221 extends into a water tank I22.
Example 2:
the difference compared with example 1 is that:
step 2) annealing buffer treatment: the steel strip is pretreated by an annealing chamber I197 in an annealing furnace at a speed of 36m/min, and the temperature in the annealing chamber I197 is controlled at 510 ℃;
step 3) annealing and heating treatment: the steel strip is annealed in annealing chambers II 1971, III 1972, IV 1973 and V1974 in an annealing furnace at a speed of 36m/min, and the temperatures in the annealing chambers II 1971, III 1972, IV 1973 and V1974 are respectively controlled to be 607 ℃;685 ℃;770 deg.c; 837 ℃;
step 4) annealing constant temperature treatment: the steel strip is annealed in an annealing furnace through an annealing chamber VI 1975, an annealing chamber VII 1976 and an annealing chamber VIII 1977 at a speed of 36m/min, and the temperatures in the annealing chamber VI 1975, the annealing chamber VII 1976 and the annealing chamber VIII 1977 are all controlled to be 1065 ℃;
step 5) cooling treatment: the steel strip is rapidly water-cooled to 38 ℃ by a cooling mechanism 21 through a spray cooling method;
example 3:
the difference compared with example 1 is that:
step 2) annealing buffer treatment: the steel strip is pretreated by an annealing chamber I197 in an annealing furnace at the speed of 44m/min, and the temperature in the annealing chamber I197 is controlled at 485 ℃;
step 3) annealing and heating treatment: the steel strip passes through annealing chambers II 1971, III 1972, IV 1973 and V1974 in an annealing furnace at the speed of 44m/min for annealing treatment, and the temperatures in the annealing chambers II 1971, III 1972, IV 1973 and V1974 are respectively controlled to be 583 ℃;660 ℃;754 deg.c; 812 ℃;
step 4) annealing constant temperature treatment: the steel strip is annealed in an annealing furnace through an annealing chamber VI 1975, an annealing chamber VII 1976 and an annealing chamber VIII 1977 at the speed of 44m/min, and the temperatures in the annealing chamber VI 1975, the annealing chamber VII 1976 and the annealing chamber VIII 1977 are controlled to be 995 ℃;
step 5) cooling treatment: the steel strip is rapidly water-cooled to 22 ℃ by a cooling mechanism 21 through a spray cooling method;
comparative example 1:
the duplex stainless steel is annealed by the application number 2022103391641 super duplex stainless steel and an annealing method.
Mechanical properties were measured according to GBT4237-2015 for examples 1, 2, and 3, and the results are shown in table one:
table one:
| tensile strength Mpa | Specified plastic elongation strength Mpa | Elongation after break% | Conclusion(s) | |
| Example 1 | 563 | 880 | 32 | Qualified product |
| Example 2 | 585 | 925 | 38 | Qualified product |
| Example 3 | 542 | 873 | 36 | Qualified product |
According to the internal standards of enterprises, randomly extracting the annealed steel belts of the examples 1-3 and the comparative example 1, randomly intercepting the steel belts to 500-1000 mm, and visually inspecting the surfaces of the steel belts to obtain the results shown in a table II:
and (II) table:
| whether or not the surface has defects | Conclusion(s) | |
| Example 1 | Visual surface smoothness | Qualified product |
| Example 2 | Visual surface smoothness | Qualified product |
| Example 3 | Visual surface smoothness | Qualified product |
| Comparative example 1 | The surface of the visual strip steel has the defects of black spots, carbon deposition and the like | Failure to pass |
The foregoing is merely illustrative and explanatory of the invention, as it is well within the scope of the invention as claimed, as it relates to various modifications, additions and substitutions for those skilled in the art, without departing from the inventive concept and without departing from the scope of the invention as defined in the accompanying claims.
Claims (6)
1. An annealing process for improving control of the hot rolled plate shape of duplex stainless steel is characterized by comprising the following steps of,
1) Degreasing: cleaning oil dirt and impurities on the surface of the rolled steel strip in an elastic degreasing box;
2) And (3) annealing and buffering: the steel strip is pretreated in an annealing chamber I in an annealing furnace at a speed of 15-60m/min, and the temperature in the annealing chamber I is controlled at 450-550 ℃;
3) Annealing and heating treatment: the steel strip passes through an annealing chamber II, an annealing chamber III, an annealing chamber IV and an annealing chamber V in an annealing furnace at a speed of 15-60m/min for annealing treatment, and the temperatures in the annealing chamber II, the annealing chamber III, the annealing chamber IV and the annealing chamber V are respectively controlled at 580-620 ℃; 650-710 ℃; 750-800 ℃; 810-860 ℃;
4) Annealing and performing constant temperature treatment: the steel strip passes through an annealing chamber VI, an annealing chamber VII and an annealing chamber VIII in an annealing furnace at a speed of 15-60m/min for annealing treatment, and the temperature in the annealing chamber VI, the annealing chamber VII and the annealing chamber VIII is controlled to be 970-1120 ℃;
5) And (3) cooling treatment: the steel strip is rapidly cooled to 20-60 ℃ by a cooling mechanism by utilizing a spray cooling method.
2. The annealing process for improving the control of the hot rolled plate shape of the duplex stainless steel according to claim 1, wherein the degreasing box is internally provided with two groups of driving rollers and a plurality of guiding rollers, steel belts are wound on the outer sides of the driving rollers and the guiding rollers, a rolling brush mechanism is arranged on one side of the guiding roller above, a cleaning mechanism is arranged on one side of the rolling brush mechanism, and a collecting box I is arranged below the rolling brush mechanism; the round brush mechanism includes fixed plate, the spout, motor I, the eccentric wheel, the mounting bracket, spacing frid, the breakwater, the brush roller, the installation axle, the in-wheel motor, wash the shower nozzle, the connecting plate, electric telescopic handle I, the delivery pipe, water pump II, water tank II, fixed plate fixed mounting is inside the degreasing box, fixed plate one side meshing activity is equipped with the mounting bracket, fixed plate one side limit frid passes fixed plate one side spout and motor I output establish eccentric wheel protruding axle meshing movable mounting, motor I installs on the fixed plate, the mounting bracket opposite side is equipped with the breakwater, fixedly on the breakwater is equipped with the installation axle, be equipped with in-wheel motor on the installation axle, the in-wheel motor outside is equipped with the brush roller, brush roller movable mounting is on the installation axle, breakwater one side movable mounting has wash the shower nozzle, wash shower nozzle one side and pass through the connecting plate fixedly, connecting plate one side movable connection electric telescopic handle I one end, electric telescopic handle I other end movable mounting is on the mounting bracket, wash shower nozzle one end and pass through hose intercommunication delivery pipe, delivery pipe one end is sealed, other end fixed intercommunication water pump II other end is in the water tank II.
3. The annealing process for improving the control of the hot rolled plate shape of the duplex stainless steel according to claim 1 is characterized in that a degreasing box is arranged on one side of the inlet end of the annealing furnace, a frame is arranged on one side of the outlet end of the annealing furnace, two groups of driving rollers are arranged on the frame, one side of each driving roller is fixedly connected with the output end of a driving motor I, a cooling mechanism is arranged on the frame, a water tank I is arranged on one side of the frame, and a water pump I is arranged above the water tank I; the annealing furnace is internally provided with a plurality of partition boards, the annealing furnace is divided into an annealing chamber I, an annealing chamber II, an annealing chamber III, an annealing chamber IV, an annealing chamber V, an annealing chamber VI, an annealing chamber VII and an annealing chamber VIII by the plurality of partition boards, the top of the plurality of annealing chambers is fixedly communicated with an air inlet pipe, a plurality of burners are arranged at the bottom of the annealing furnace, a plurality of transmission rollers are arranged in the annealing furnace, one side of each transmission roller is fixedly connected with a driving motor II, one side of each annealing furnace is provided with a motor III, a plurality of rollers are arranged on an output main shaft of the motor III, a connecting belt is wound on each roller, and a plurality of spoilers are fixedly arranged on each connecting belt.
4. The annealing process for improving control of duplex stainless steel hot rolling plate type according to claim 1, wherein the cooling mechanism comprises a movable frame I, a guide frame, an electric telescopic rod VI, a cooling pipe, a rotary joint, a fixed plate, an adjusting frame, a fixed water pipe, an electric telescopic rod VII, a movable frame II, an electric telescopic rod VIII and a limiting plate, wherein the limiting plate is fixedly installed on supporting beams on two sides of the frame, the movable frame II is movably installed in the limiting plate, the electric telescopic rod VIII is arranged between the movable frame II and the frame, two groups of movable frames I are arranged in the movable frame II, the two groups of movable frames I are respectively arranged on the upper side and the lower side of a steel belt, one side of the movable frame I is provided with the electric telescopic rod VI, the other end of the electric telescopic rod VI is fixedly installed on the movable frame II, the movable frame I is movably provided with the cooling pipe, one side of the cooling pipe is provided with a plurality of high-pressure spray heads, one end of the cooling pipe is fixedly communicated with the rotary joint, the rotary joint is installed on the movable frame I through the fixed plate, one side of the cooling pipe is fixedly provided with the rack on one side of the adjusting frame, the adjusting frame is movably installed on the guide frame II, one side of the guide frame I is fixedly installed on one side of the movable frame I is fixedly connected with the other end of the electric telescopic rod through the electric telescopic rod, and the other end of the water pump I is fixedly connected with one end of the water pump I through the telescopic pipe.
5. The annealing process for improving the control of the hot rolled duplex stainless steel plate shape according to claim 2, wherein the bottom of one end of the collecting box I is provided with a through hole, the bottom of one end of the collecting box I extending out of the degreasing box 11 is provided with a through hole, and the collecting box III is arranged below the through hole.
6. The annealing process for improving control of the hot rolled plate type of duplex stainless steel according to claim 2, wherein the cleaning mechanism comprises a protection box, a sliding table, a motor II, a screw rod, a guide rod, a movable base, a limit rod, an electric telescopic rod II, a locking rod, a fixed seat, an electric telescopic rod III, a push plate, a storage box, an electric telescopic rod IV and an electric telescopic rod V, wherein the protection box is fixedly arranged on the outer side of the degreasing box, the motor II is arranged on one side of the protection box, the output end of the motor II is provided with the screw rod, the screw rod is movably arranged on the protection box and the degreasing box, the guide rods are arranged on two sides of the screw rod, the guide rods are fixedly arranged on the protection box and the degreasing box, the screw rod and the guide rods are meshed with the movable base, one side of the movable base is provided with the limit rod, a cleaning block is movably arranged on the limit rod, the bottom of the movable base is provided with the fixed seat, the locking rod is movably arranged on the fixed seat, one side of the locking rod is movably connected with the electric telescopic rod II, the other end of the electric telescopic rod II is movably arranged on the movable base, the lower side of the protection box is provided with the sliding table, the inner part of the protection box is fixedly arranged on the storage box, the other side of the protection box is fixedly arranged on the protection box is provided with the electric telescopic rod III, the push plate is fixedly arranged on the storage box, the protection box is fixedly arranged on the storage box, and the protection box is fixedly arranged on the storage box is arranged on the side of the protection box is arranged on the side of the cleaning box; the cleaning block bottom is equipped with the spacing groove, is equipped with the locking groove between two sets of spacing grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311035095.6A CN116970790A (en) | 2023-08-17 | 2023-08-17 | Annealing process for improving control of hot rolled plate shape of duplex stainless steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311035095.6A CN116970790A (en) | 2023-08-17 | 2023-08-17 | Annealing process for improving control of hot rolled plate shape of duplex stainless steel |
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